10 - 1 Chapter 10 8086/8088 Hardware Specifications 2 The...

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Unformatted text preview: 1 Chapter 10 8086/8088 Hardware Specifications 2 The 8086/8088 Although these microprocessors are fairly old, they still are a good way to introduce the Intel family of microprocessors. Both machines are 16-bit microprocessors. The 8088 has an 8-bit data bus and the 8086 has a 16-bit data bus. Still used in embedded systems because the cost is low. 3 4 Pin-Out Both μ p are packed in 40-pin dual in-line packages (DIPs). Differences: 8086 has pin connections AD0-AD15, 8088 (AD0- AD7) 8086 has an M/IO , 8088 (IO/M ) Pin 34: BHE /S7 (8086), SS0 (8088) 5 Power Supply Requirements Both μ p require +5.0 V ,+/- 10%. 8086 uses a maximum supply current of 360mA, 8088 draws a maximum of 340 mA. Ambient temperatures: 32F – 180 F. 6 DC Characteristics Input: Logic 0: 0.8V(max), +/-10 μ A Logic 1: 2.0V(min), +/-10 μ A Output: Logic 0: 0.45V(max), +10 μ A Logic 1: 2.0V(min), -400 μ A Fan-out: Not more than 10 loads connected to the output pin. 7 Pin Connections AD7-AD0: 8088 address/data bus, select address bus (ALE=1), select data bus (ALE=0). A15-A8: 8088 address bus, upper-half memory. AD15-AD8: 8086 address/data bus, select address bus (ALE=1), select data bus (ALE=0). A19/S6-A16/S3: Address/status bus bits. RD : Data bus read data from memory or I/O devices when RD =0; READY: Insert wait states into the timing of the μ p when READY=0....
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This note was uploaded on 10/23/2011 for the course BME KUEU taught by Professor Ting during the Fall '10 term at Universiti Teknologi Malaysia.

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10 - 1 Chapter 10 8086/8088 Hardware Specifications 2 The...

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